... maintain Zhengzhou Bangke Machinery Manufacturing Co., Ltd. is specialized in large and medium-sized series of crusher, sand making ... is used to grind barite, calcite, potash feldspar, talcum, marble, limestone, Ceram and slag below scale 7 of Moth’ ... humidity less than 6% in mining, construction, chemical industry and metallurgy, such as barite, calcite, feldspar, talcum, marble, limestone, clay, glass ...